HAWAIIAN CIRRIPEDIA. 



183 



Length of eapitulura, specimen from station 3824, 12.6 ram., width 6 mm.: length of peduncle 

 2 mm. 



Type no. 32419, U. S. National Museum, from Albatross station 3907, south coast, of Oahu, 315 

 fathoms, on the spine of a cidaroid sea-urchin, with Pcecilasina; bottom fine white sand and mud. 

 Specimens also from station 3824, south coast of Molokai, 222 to 498 fathoms, on nijaloncma: liottDUi of 

 coral rock and broken shell. 



This species is more closely related to S. au-stralicum Hoeka, than to any other known form. It 

 differs from that in the sculpture of the valves, each having a stronger diagonal ridge, and in the shape 

 of the plates of the basal whorl, especially the rostral latera, which in the Challenger species are as high 

 as wide. The inframedian and carinal latera also differ in several respects, and the umbo of the upper 

 lateral plate does not imbricate over the scutum as it does in S. australicum. Scalpellum hirsiiiiifn , 

 S. tenue, etc., are also allied species, but are clearly distinct by various characters. 



Trilasmis eburneum Hinds. 



Trilasmis eburnea Hinds. Voyage of tlie Sulphur, vol. i, MoUusca, 



p. 72, pi. 21, Sg. 5, 1844. 

 Facilasma churnea Darwin, Monograph on Cirripedia, p. 112, pi. 



2, fig. 5, 1851. Gruvel, Monogr. des Cirrhip6des, p. 120, fig. 139 



(copied from Darwin), 1905. 



Albatross station 3845, south coast of Molokai in 

 60 to 64 fathoms, on spines of a ('iVZ«ci's-like sea-urchin. 



This rare species has been known hitherto only 

 from specimens taken sixty years ago by the Sulphur 

 on the coast of New Guinea. They occurred on the 

 spines of an "Echinus/' The Hawaiian specimens 

 differ from them in being a little larger, the capitu- 

 lum 3.4 mm. long, and slightly unlike in the shape 

 of the carina, the upper part of which is more attenuated, while the basal cup is more flattened. AMiile 

 this variation is prolialily of no great importance, I have deemed it well to figure the scutum and carina 

 of a Hawaiian individual. 



Fig. 1.. 



Trilasmis eburneum. Scutum and two views 

 of carina. 



Pcecilasma kaempferi Darwin. 

 Pai-ilasma ksempferi Darwin, Monogr. Lepa<lid;e. p. Kiii. 



Albatross station 3984, between Honolulu ami Kauai, 164 to 237 fathoms. Station 3839, south coast 

 of Molokai, 259 to 266 fathoms. Station 3884, Pailolo Channel, 284 to 290 fathoms. Station 4117, north- 

 west coast of Oahu, 282 fathoms. On the crab Cyrtomaia smithi Rathbun. Also stations 3811, south 

 coast Oahu, 338 fathoms, and 4045, west coast Hawaii, 198 fathoms, on Lambrus (Platylambrus) stdlalus 

 Rathbun. 



The species was originally described from Japan, attached to the crab Inachns kxvipferi De Haan. 

 It is new to the Hawaiian fauna. A very similar form, P. aurantia Darwin, occurs at Madeira, and Ijy 

 some authors has been considered to form merely a variety of the Japanese P. Icxmpferi. 



If Po'cilastim is to be allowed to stand distinct from Trilasmis, it will be for species of the type of 

 P. kaempferi, most of which are cancericoles. 



Pcecilasma bellum, n. sp. 

 [PI. IV, fig. 0.] 



The capitulum is elliptical, acute at both ends, and composed of five wholly calcified valves in 

 close contact. White or flesh-tinted by the viscera showing through. The occludent and carino-tergal 

 outlines are equally convex. The margins of the peduncle foramen flare laterally. 



The scutum is very large, convex, its surface divided by a prominent angle passing in a curve 

 from the beaks to the angle at the junction of carina and terga. The basal and occludent margins 

 form a single symmetrical curve, the basal making no angle with the occludent. The carinal margin 



"•Challenger Report, vol. viii, Cirripedia, p. 118. pl.v, fig. 11. 



